Mythos of Illuna + Radiate + Shipwreck Dowser

Mythos of Illuna

Radiate

Shipwreck Dowser

How it works

1. Cast Mythos of Illuna by paying 2, targeting anything but Shipwreck Dowser.
2. In response, cast Radiate by paying 3, creating copies of Mythos of Illuna that target each permanent besides the original target.
3. Resolve all copies of Mythos of Illuna besides the original, creating token copies of each permanent besides the original target.
4. The token copy of Shipwreck Dowser enters the battlefield, triggering itself, returning Radiate from your graveyard to your hand.
5. Activate the token lands or other mana-producing permanents created in step 3 by tapping them, adding at least 3.
6. Repeat from step 2, doubling the number of copies created in step 3 each repetition.